Features: Experience quiet operations with this oxygen pump with thickened ABS noise reducing shell, delivering efficient oxygen supply for home aquariums and outdoor fishing. Engineered with powerful motors and low noise chlorinated rubber diaphragms, this aerator ensures stable performances with minimal heat generation during extended operations. Great for home aquariums owners and fishing enthusiasts requiring great oxygenation solution for indoor tanks or outdoor fishing gear maintenance. Perfect for aquariums use, camping trip, and mobile fishing setups with its USB rechargeable design and portable construction. With durability natural rubber component and oxidation resistant part, this energy efficient air pumps combines with performances for water environment. Specifications: Component: ABS Product Size: Approx. 01/02 size 13.5x8x7cm/5.31x3.14x2.75inch, 03 size 15.5x8x7cm/6.1x3.14x2.75inch, 04 size 16.5x8x7cm/6.49x3.14x2.75inch Type: 01(50H)/02(70H)/03(60H)/04(105H) Package Includes: 1PC USB Rechargeable Oxygen Pump note: Please allow 1-2cm error due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color the item.